Computer controlled pull gun system

Metal deforming – By relatively movable offset tool-faces – With tool motion in fixed path

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Details

723918, 72 199, 29243523, B21J 1528

Patent

active

055266690

ABSTRACT:
A computer controlled pull gun system for pulling interference fit fasteners into a mounting hole. The pull gun has a rotatable and axially movable mandrel the is driven by a pneumatic motor. An axially movable piston in a hydraulic cylinder of the pull gun is attached to the mandrel to move it axially after it has been threaded into an interference fit fastener. A digital control system precisely controls the operation to the functions thread mandrel, pull mandrel, unthread mandrel to quickly and efficiently install a fastener. The digital control system controls pressurized fluid pneumatic and hydraulic valves to perform the installation functions. The digital controller responds to commands from buttons on the pull gun that select the functions and determines when a fastener has been properly installed by feedback from a pressure sensing transducer. A reset command button is provided on the pull gun to abort an installation or reset the pull gun for a new installation.

REFERENCES:
patent: 3181338 (1965-05-01), Zetterlund
patent: 3654792 (1972-04-01), Mead
patent: 4821555 (1989-04-01), Kamata et al.
patent: 5035129 (1991-07-01), Denham et al.
patent: 5152162 (1992-10-01), Ferraro et al.
patent: 5323946 (1994-06-01), O'Connor et al.

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